Python-сообщество

    @expose(content_type="text/csv")
    def get_context_csv(self, start_month, start_year, tariff_id, start_hour, start_day, start_minute):
        outputstream=StringIO.StringIO()
        writer=csv.writer(outputstream)
...
        return outputstream.getvalue()

from tg import request, response
from tg.controllers import CUSTOM_CONTENT_TYPE

class MyController(BaseController):
    @expose(content_type=CUSTOM_CONTENT_TYPE)
    def stats(self):
        response.content_type = 'text/csv'
        response.headerlist.append(('Content-Disposition','attachment;filename=stats.csv'))
        return '1,2,3'

from cherrypy import request, response

class MyController(BaseController):
    @expose(content_type='text/csv')
    def stats(self):
        response.headers['Content-Disposition'] = 'attachment;filename=stats.csv'
        return '1,2,3'